Oxidation by ozone in CHClof methyl 2-cyano-3,4-seco-4(23)-ene-ursolate formed the three 2-cyano-3,4-seco-4-oxo derivatives 11-oxours-12-ene, 12-hydroxy-4,11-dioxours-12-ene, and 12-oxours-11S,13R-oxetane. The last was formed by oxidation of intermediate 12-oxoursolate. ...
Oxidation of Methyl 2-Cyano-3,4-seco-4(23)-Ene-Ursolate by OzoneKhusnutdinovaE. F.KazakovaO. B.LobovA. N.KukovinetsO. S.CHEMISTRY OF NATURAL COMPOUNDS C/C OF KHIMIIA PRIRODNYKH SOEDINENII
Entry inhibitorsH5N1Structure-activity relationshipThe earliest stage of influenza virus infection is the viral entry to the host cell. In our previous work, we discovered the first three small molecule H5N1 viral entry inhibitors 1–3. Here, based on saponin 3, methyl ursolate 3-O-β-chaco...
Microbial transformation of cadina-4,10(15)-dien-3-one, aromadendr-1(10)-en-9-one and methyl ursolate by Mucor plumbeus ATCC 4740[J] . Dwight O Collins,Peter L.D Ruddock,Jessica Chiverton de Grasse,William F Reynolds,Paul B Reese.Phytochemistry . 2002 (5)...